Spark-arrester for locomotive or other boilers.



PATENTED AUG. 16, 1904.

J. c. BOWRING. SFARK 'ARRBSTBR PoR LOGOMOTIVE 0R OTHER BOILERS.

APLIGATION FILED FEB. 21, 1903.

2 SHEETS-SHEET 1.

N0 MODEL.

PATENTED AUG. 16, 1904.

J. C. BOWRING. SPARK ARRESTBR FOR LOGOMOTIVE 0R OTHER BOILERS.

APPLICATION FILED FEB. 21. 1903.

2 SHEETS-SHEET 2.

N0 MODEL.

- UNITED STATESA Patented August 16, 1904.

PATENT OFFICE.

SPARK-ARRESTER FOR LOOONIOTIVE OR OTHER BOILERS.

SPECIFICATION forming part of Letters Patent No. 767,860, dated August16, 1904, Application iiled February 2l, 1903. Serial No. 144,517. (Nomodel.)

To all whom, it may concern.-

Beit known that I, JOHN CHARLES Bow- RING, a subject of the King ofGreat Britain, and a resident of Sydney, in the State of New Southl/Vales, in the Commonwealth of Australia, have invented a new andImproved Spark-Arrester for Locomotive or other Boilers, with Apparatusfor Controlling and Arranging the Draft Thereto, of which the followingis a specification.

This invention has been specially devised with a view to afford greaterfacilities for preventing the escape of sparks and live cinders fromlocomotive and .other chimneys and tok provide arrangements whereby thedraft may be controlled to suit the requirements ofany class of fuel orany class of work, the construction and arrangement of the apparatusbeing so devised that it shall occupy but a small portion of the spacein the smoke-box or so-called combustion-chamber and shall be easilyremovable for the purpose of clean' ing the tubes and other portionsand, further, shall be capable of adjustment so that the portiondesignated the spark-cage may be located higher or lower than shown inthe drawings, so as to suit the requirements of any locfzouliotive orother boiler or peculiar class of ue The improved spark-arrester and theapparatus thereto in a locomotive is nominally lo# cated around and overthe exhaust-tube and nozzle and is made to connect with the chimney andmay be altered at either top or bottom, so as to suit the parts of anysmoke-box and to make good the fittings, and the material used for thespark-cage may be sheetsteel or other material perforated, having round,square, oblong, or other suitable openings of any convenient size, suchopenings having their upper edges twisted or ledged so as toformlouvers, which offer a resisting or bafliing surface to the sparks.The sparkcage may consist of one, three, or more cages, (provision isshown for three in the drawings) and each cage may be of similar ordifferent material with similar or different pierced openings, accordingto requirements.

The improved spark-arrester comprises a sition by supporting hinge-boltshangingfrom the crown of the smoke-chamber, which hinge or swivel boltssupport the whole apparatus. This tube has an iron band surrounding itslower end, on which hangs a telescopic band of iron having abayonet-holder fitted witha nut to secure it to a circular plate whichsurrounds the exhaust-pipe at any suitable distance from the bottom ofthe smoke-chamber and in which circular plate are hooks or -loops towhich hang the spark-cages. The terminating ends of these cages fallinto grooves in another plate surrounding the base of the exhaust-pipeor fitted to the fioor of the smokechamber, according to theconstruction of the yoke of the exhaust. The grooves of this plate areso high and have such space between them that the cages mayoscillate'without coming in contact with each other and without leavingY their proper position. The lower plate is in the form of a grating forthe clearance of cinders or dead sparks. To this plate is also attacheda baffle-plate, which controls the rush from the center tubes andprotects the cages; but in order that the invention may be fully graspedreference is made to the accompanying sheets of drawings, in whichMFigure l is a general arrangement showing the whole apparatus inposition as applied. Fig. 2 is a sectional elevation of the apparatusdrawn so as to cut the baflie-plate vertically through its apex, thearrows showing the movement of the fuel gases from the upper and lowertubes and the baffle distribution of these gases through the smoke-box.Fig. 3 is a plan of the apparatus, the arrows in said ligure showing themovement of the fuel products from the body-tubes as they pass thebaffler and the way in which they are distributed so that they mayapproach the spark cage or arrester with the same general force. Fig. 4is a plan view of the funnel extension. Fig.

5 is a side 'elevation showing the bayonetholder connected with thefunnel extension or cylinder. Fig'. 6 is a section of the telescopefitting-piece. Fig. 7 is a section of the material for the cages,showing the louvers to the apertures. Fig. 8 is a rear elevation of thebaffle-plate, showing the strengtheningweb and securing-flange.

In the drawings, l represents the smoke box or chamber of a locomotiveor other boiler; 2, the boiler-tubes; O, the funnel or chimney, and Kthe exhaust-pipe. l

F represents the funnel extension or cylinder made to lit within thefunnel or chimney O and provided with two slotted lugs a to receive thehinge-bolts hanging from the crown of the smoke-chamber, the lugsresting upon the nuts Z of the hinge-bolts. On the f lower end of thefunnel extension is hung the telescopic band e, having thebayonet-holder f, connecting the said band e with the circular plate f.This plate f is provided with the hooks g, on which the spark-cages Gare hung. These spark cages are preferably formed of steel and areprovided with the openings /L and the ledges/1,' at the upper edge ofsaid openings, as shown in Fig. 7.

VH represents the bottom plate in the form of a grating and constitutingthe bottom of the spark-arrester and on which the sparkcages oscillate.This plate H has a series of circular spaced ridges it, forming groovesin which the lower ends of the cages loosely rest, as shown in Fig. 2.

B is the vertical baffle-plate of angular formation and having its apexA presented to A the tube-plate to distribute the products of combustionthrough the smoke-box. The bafiie-plate B has a strengthening-web andsecuring-lugs m and is attached to a securinglug a on the bottom plateH, as shown in Fig. 2.

In Fig. 2 the arrows C show the movement of the results of combustionfrom the upper tubes retarded by the funnel extension F, which acts as abafiler or distributer and directs their further progress downward tothe spark-cages Gr.

The arrows D in Figs. 2 and 3 show the movement of the fuel productsfrom the Wing and center tubes, which have been baffled by the baiiler Bin their course and so distributed that they approach the spark cageoral-rester with equal force, thus equalizing the draft and efficiencyof all the tubes.

The funnel extension or cylinder F, Which connects the spark-cages withthe funnel O, concentrates the give-off of the exhaust K. The nozzle endof the exhaust-pipe enters the cylinder F above the spark-cages, asshown at M in Fig. 2, so as to create a good draft and a regular draftvacuum. This arrangement is a peculiarity of this arrester.

The spark-arrester may be made of any length required. The cages may beshortened or lengthened, and the funnel extension may be lengthened orshortened, according to the length and peculiarities of the exhaust-pipeor the necessities and requirements brought about by the construction ofthe smoke-chamber or the peculiarities of the boiler and furnace andfurther to cope with the natural peculiarities of the fuel.

By releasing the nuts of the hinge-bolts, on which the lugs of thefunnel extension rest, the funnel extension or tube may be turned aroundtoy release the bayonet-holder and can be easily removed. The plate withthe hanging cages, comprising the remaining portion of the apparatus,can then be easily removed, the whole operation taking but a fewinoments, and then with all obstructions removed tube-cleaning, removalof ashes, or any other necessary work may be proceeded with.

The cages may be one or any number, according to requirements` and areso hung that they take up fully the vibration and oscillation ofthelocomotive.

The ridges in the bottom plate permit sufiicient movement in the cages,so that the apertures may be kept clear of obstructions. At the sametime these ridges keep each cage in its proper position.

The baffle-plate presents its apex to the tubeplate, and thusdistributes the results of combustion-so that they approach the arresterwith the same general force as the Whole of the contents of thesmoke-box. The bafiieplate is also at suiicient distance from the cagesso as to form no obstruction to the passages or apertures.

The invention in operation may be explained as follows: The results ofcombustion in the fire-box find their Way through the tubes, and as byjudicious baffling the whole of the tubes are made to dravv regularlyand with equal volume each tube does equal work, and the liability ofnon effective tubes becoming ,blocked by debris is avoided. All thetubes being kept sensitive, the whole of the heatingsurface isoperative, giving increased results. The fuel products from the uppertubes are baied by the cylinder F, connecting the spark cages orarrester with the funnel or out-take O. The combustion results from thecenter, wing, and lower tubes are baffled by the baffier B, thus giving'an equal duty and draft to each ofthe tubes and causing all the smokeand gases to -approach the spark-arrester Gr with the same generalforce. The nozzle of the exhaust being above the spark-arrester andbeing surrounded by the cylinder F, the volume of the exhaust iscompacted and a longer and more perfect vacuum created in the smoke-box'at each cough or stroke of the exhaust, thus increasing the draft andinsur- IOO IIO

The improved results in the steam-cylinders will also vbe great, for theopening of the nozzle will greatly reduce the back pressure on thepistons and improve the cylinder vacuum.

' Having thus described my invention,I claim as new and desire to secureby Letters Patentl. In a locomotive or other boiler, a verticalcylindrical spark-arrester hung from the crown of the smoke-box andcomprising a tube extending into the chimney, and a cage suspended fromsaid tube and surrounding the exhaust-pipe, the top of the cage beinglocated below the nozzle of said pipe, as set forth.

2. In a locomotive or other boiler, a vertical cylindricalspark-arrester hung from the crown of the smoke-box, the said arresterhaving a plurality of hanging cages surrounding the exhaust-pipe andlocated below the nozzle of said pipe, and a bottom plate on which saidcages rest, as set forth.`

3. The combination with the smoke-box and exhaust of a locomotive orother boiler, of a vertical cylindrical spark-arrester hung from thecrown of the smoke-box, and comprising a tube extending into the chimneysurmounting said box, a circular plate connected with the tube, rows ofhooks on said plate, a plurality ofcages hung on said hooks, and abottom plate on which the cages rest, as set forth.

4. A spark-arrester for locomotive or other boiler, comprising a tuberemovably hung from the crown of the smoke-box, and extending into thechimney surmounting said box, an `annular plate removably connected withsaid tube, a plurality of spark-cages suspended from said plate, and abottom plate comprising a grating having a series of spaced circularridges forming grooves in which the lower ends of the cages looselyrest, as set forth.

5. The combination with the smoke-box and exhaust of a` locomotive orother boiler, of a cylindrical spark-arrester, comprising a tubeextending into the chimney surmounting said box, slotted lugs on thesides of said tube, and hinge-bolts suspended from the crownfof thesmoke-box and engaging said lugs, as set forth.

6'. In a locomotive or other boiler a vertical cylindricalspark-arrester, hung from the crown of the smoke-box, a bottom platesuitably supported, and on which said spark-arrester rests, the saidspark-arrester extending into the chimney surmounting said smoke-box,and a vertical baffle-plate of angular formation, and having the apex ofthe angle presented to the tube-plate to distribute the results ofcombustion through the smoke-box, the said baille-plate being attachedto the bottom plate, as set forth.

7 The combination with the smoke-box and exhaust of a locomotive orother boiler, of a vertical cylindrical spark-arrester hung from thecrown of the smoke-box and comprising a tube extending into the chimneysurmounting said box, a circular plate having an interlockyingconnection with said tube,l a sheet-metal cage suspended from said plateandy having openlngs formed therein, the upper edges of said openingsbeing provided with ledges to form baffling-surfaces to the upwardpassage of sparks, and a bottom plate suitably supported and on whichthe cage rests, as set forth.

8. The combination with the smoke-box and exhaust of a locomotive orother boiler, of a spark-arrester, movably hung or suspended from thecrown of the smoke-box and comprising a tube leading into the chimneysurmounting said box, a spark-cage surrounding the exhaust-pipe belowthe nozzle of the same, and an interlocking connection between said tubeand said cage.

9. The combination with the smoke-box and exhaust of a. locomotive orother boiler, of a spark-arrester movably hung or suspended from thecrown of the smoke-box, and comprising a tube leading vinto the chimneysurmounting said box, telescoping sections fitted to the lower end ofsaid tube, a circular plate, an interlocking connection between thelatter and said sections, and a spark-cage movably hung or suspendedfrom said plate.

l0. The combination with the smoke-box and exhaust of a locomotive orother boiler, of a spark-arrester movably hung or suspended from thecrown of the smoke-box, and comprising a tube extending into the chimneysurmounting said box, telescoping sections fitted to the lower end ofsaid tube, a circular plate and a bayonet-joint connection between thelatter and said sections, and a cage movably suspended from said plate.

11. The combination with the smoke-box and exhaust-pipe of a locomotiveor other boiler, of a spark-arrester movably hung from the crown of thesmoke-box, and comprising a tube extending into the chimney surmountingsaid box, telescopic sections fitting the lower end of said tube, acircular plate and a bayonet-joint connection between the latter andsaid sections, a plurality of concentric spark-cages, movably suspendedfrom said plate, and a grating at the lower end of said cages, havingspacing-flanges for the latter.

12. The combination with the smoke-box and exhaust of a locomotive orother boiler, of a spark-arrester movably suspended from the crown ofthe smoke-box, and comprising a tube extending into the chimneysurmounting said box, telescoping sections fitted to the lower end ofsaid tube, a circular plate and an interlocking connection between thesame and said sections, and a spark-cage movably suspended from saidplate, said cage being formed with openings having inclined ledges attheY upper edges thereof. t

13. The combination with the smoke-box' and exhaust of a locomotive orother boiler, of a spark-arrester comprising a tube, movably suspendedfrom the crown of said smoke-box IOO IOS

and a Spark-cage detaehably connected to said of spaced circular ridgesforming grooves to tube and havmg a Swmgmg support therereeelve theedges of the several cages and IO trom, the spark-cage surroundmgtheexhaustspace the cagesapart-` pipe and the upper edge of said cage being1 Y r 5 below the nozzle of the exhaust. (JHARLEb BOWRNCT' 14. Aspark-arrester comprising a plural- VtnesSes: ity Of spark-cages, and agrating atthe lower L. C. RUSSELL JONES,

end thereof, the said grating having 2L series JOHN A. J. POST.

